Question

How to check if a sequence of numbers is an Arithmetic progression (consecutive differences are the same) in TypeScript

Answer 1

function isArithmeticProgression(arr: number[]) {
    const size: number = arr.length;
    if (size === 1) {
        return true;
    }
 
    arr.sort((a, b) => a - b);
 
    const difference: number = arr[1] - arr[0];
    for (let i: number = 2; i < size; i++) {
        if (arr[i] - arr[i - 1] !== difference) {
            return false;
        }
    }
 
    return true;
}
 
const arr: number[] = [10, 20, 40, 15, 5, 25, 35, 30];
 
console.log(isArithmeticProgression(arr) ? "Yes" : "No");
 
 
 
/*
run:
 
"Yes" 
 
*/

 

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